Other key components in a polyurethane to be discussed will include polymer structure modifiers (chain extenders and crosslinkers); catalysts, including the different types and mechanism of action (blowing reaction, gel reaction and trimerization); surfactants (type and activity); blowing agents, including a brief history and all the newest developments; other additives (antioxidants, UV stabilizers, flame retardants and fillers); and environmental, health and safety (handling isocyanates
, handling polyols, catalysts, surfactants, etc.
The reaction in water of UF resins with isocyanates
at short curing times: A [13.
The primary literature would have informed her that beyond contact irritation, toxicity of the isocyanates
With the advent of mass production of isocyanates
and polyester compounds for the manufacture of polyurethane foams.
Dual functionality polyisocyanates produce linear polymers; trifunctional isocyanates
produce the desired crosslinked structure.
As the metalcasting industry moves into more semi-permanent mold and aluminum sand-casting applications, the process may offer a workplace that doesn't contain isocyanates
or formaldehyde as decomposition products.
The objective of this review is to analyse the global and CIS isocyanates
com adds "Market Research Report on Global and Chinese Isocyanates
Industry, 2009-2019" and "Isocyanate
Market by Type (MDI, TDI, Aliphatic, Others) & Application (Rigid Foam, Flexible Foam, Paints & Coatings, Adhesive & Sealants, and Elastomers & Binders) - Global Trends & Forecast to 2019" research reports to its store.
Nisocoat 2, a new non-isocyanate
acrylic coating, which offers similar technical performance to two-pack polyurethane finishes, with none of the health and safety concerns associated with isocyanates
is the newest product from HMG Paints Ltd.
Since monomeric isocyanates
have toxicity issues, polymeric isocyanates
or prepolymers are used in coatings.
Acrylic Polyol - MDI (MMDI & PMDI) - TDI - Specialty Isocyanates
- Standard Polyether Polyol - Polyether Graft Copolymer Polyol - Polyester Polyol - PTHF Polyol
This generalization is usually observed in 4,4'-diphenyl methane diisocyanate (MDI), but does not necessarily hold true for the less structured toluene diisocyanate (TDI) and similar isocyanates